National Farmers Convene'17 Springfield, MO 1/25/2017

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1 The State of Precision Ag VRT Variable Rate Technology A Look Back and Into the Future Technology in 20 years (at least for me) Kent Shannon Natural Resource Engineer Boone County Technologies for Soil Sampling Technologies for Soil Sampling The Basis Behind VR Fertilizer 1

2 The Basis Behind VR Fertilizer Equation Output : P Rec for Corn If [Soil P1] < Then Proposed Soil Test P Recommendations Current MU Rec RESULT= ( [Corn Yield Goal] * ) + ( * ( ^ ( [Soil P1] * ) ^ ) ) / [Build Years] Else If [Soil P1] >= Then RESULT= [Corn Yield Goal] * * ( ( * ( ( * ( ( [Soil P1] * ) / ) ) ) ) / ) Proposed MU Rec Equation Output : P Rec for Corn If [Soil P1] < Then RESULT= ( [Corn Yield Goal] * ) + ( ( * ( [Soil P1] ) ) / [Build Years] ) Else If [Soil P1] >= Then RESULT= [Corn Yield Goal] * * ( ( * ( ( [Soil P1] / ) ) ) ) Effect On Changing Soil Test P Critical Value From 45 to 30 lbs/acre VR Fertilizer Recommendation Change in Total Amount of P 529 lbs or 16 lbs/acre Variable Rate Fertilizer Technology VR Fertilizer Application 2

3 Historical Aerial Photos from the County FSA Office Note the farmstead and two ponds prior to Only 95 ton of lime was applied instead of 294 ton if 2 ton/acre was applied as a blanket rate VR Lime Application VRT to the Next Step - Soil Sensing Veris MSP3 Soil Mapping Development of Management Zones Use of Soil Electrical Conductivity and Past Years Yield Maps yield targets.jpg 3

4 Development of Management Zones Development of Management Zones Productivity Zone Low Medium High Soil EC (ms m -1 ) Nitrogen Rate (lbs/acre) Seeding Rate (seeds/acre) , , ,000 VR Planting VR Planting Implementation of Experiment Results and Discussion Yield Maps Corn was planted using a 16-row planter. Planter was equipped with a variable rate drives to control each half of the planter. This allowed the producer to plant his half of the planter with variable seeding rate and the other half to his usual whole field rate of 28,000 seeds/acre. GPS data was collected on the variable rate side of the planter by mounting the GPS antenna in the middle of that half of the planter. 4

5 Results and Discussion Yield Summary VR Hybrids Productivity Zone Fixed-rate seeding Variable-rate seeding Low Medium High Field Average Yield in bushels per acre Soil Sensors Continue to Evolve Measures soil organic matter Measures soil moisture Maps and controls VR seeding on the go Precision Planting's new SmartFirmer In Season Variable Rate Nitrogen Application Greenness of Corn at Side Dress 6/3/04 Miami, MO Reference strip with 150 lbs N on 5/6 Target strip for side dress Average of 175 lbs N applied 5

6 Reference strip with 180 lbs N on 4/19 Greenness of Corn at Side Dress 6/4/04 Emma, MO Target strip for side dress Average of 90 lbs N applied 6/4 Sensor-Based Nitrogen Application Outcomes from the sensor demos 55 replicated on farm trials Increased corn yield by 2 bushels/acre Reduced N use by 14 pounds/acre Increased partial profit by $17/acre Reduced surplus N by 27% Based on Missouri interpretations for sensors Works with all N forms, placements Tools for Managing Nitrogen Tools for Managing Nitrogen Utilizing Drone Technology for VRT 6

7 Turning Drone Image into N Application Map utilizing Turning Drone Image into N Application Map utilizing Treatment Sidedress N Rate lbs/acre Producer Nvision OptRx Corn Yield bu/acre Future of Drones / Sensor Technology Future of Drones / Sensor Technology 4 Band Sensor Green, Red, Red Edge, NIR DJI Phantom 4 with Sentera Single NIR Sensor and Standard RGB Camera Sunlight Sensor From DJI Phantom 3 with Sentera Single NIR Sensor and Standard RGB Camera For more information contact: Kent Shannon Natural Resource Engineer University of Missouri Extension - Boone County phone: shannond@missouri.edu 7